Who are the De Facto Offensive and Defensive Co-ordinaters? Bill O'Brien the QB coach was calling the plays last season, I believe. His first yea doing so since the vacancy opened. I think everyone thinks it was a mixed bag. Belichick didn't move him up to De Jure OC.. Is he still on probation? What can we expect from him? Dean Pees left. Who is the De Facto Defensive Co-ordinater? Belichick said he would be working more closely with the Defense. Whatever that means. Meanwhile Corwin Brown has been added to the roster of Coaches. He is listed simply as a defensive coach but no specific area was assigned to him. What are his duties?